Vols. 4-5 and 8, those first published, edited by J.A. Smith and W.D. Ross
Each work in v.1-11 has special t.p. or half title, and many were issued separately, as printed, in boards or paper covers. The volumes and paging correspond to the Oxford ed. of Bekker's Greek text
This book is not conventionally paginated. By that I mean each page having a distinct number and increasing by 1 per page. It is numbered by section. A section may last for 3 pages - each numbered the same. It can also end in the middle of a page, with the next number up starting there.
There is usually a synopsis or contents at the beginning of each book and usually an index at the end of each book.